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參數(shù)資料
| 型號： | TC1219ECHTR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 20 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | EIAJ, SC-74, SOT-23A, 6 PIN |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 482K |
| 代理商： | TC1219ECHTR |
2002 Microchip Technology Inc.
DS21366B-page 1
M TC1219/TC1220
Features
Charge Pumps in 6-Pin SOT-23A Package
>95% Voltage Conversion Efficiency
Voltage Inversion and/or Doubling
Operates from +2.5V to +5.5V
Up to 25mA Output Current
Only Two External Capacitors Required
Low Power Consumption
Power-Saving Shutdown Mode
TC1220 Compatible with 1.8V Logic Systems
Applications
LCD Panel Bias
Cellular Phones
Pagers
PDAs, Portable Dataloggers
Battery-Powered Devices
Device Selection Table
Package Type
General Description
The
TC1219/TC1220
are
CMOS
“charge-pump”
voltage converters in ultra-small 6-Pin SOT-23A
packages. They invert and/or double an input voltage
which can range from +2.5V to +5.5V. Conversion
efficiency is typically >95%. Switching frequency is
12kHz for the TC1219, 35kHz for the TC1220. When
the shutdown pin is held at a logic low, the device goes
into a very low power mode of operation, consuming
less than 1
A of supply current.
External component requirement is only two capacitors
for standard voltage inverter applications. With a few
additional components a positive doubler can also be
built. All other circuitry, including control, oscillator,
power MOSFETs are integrated on-chip. Typical supply
currents are 60
A (TC1219), 115A (TC1220).
All devices are available in 6-pin SOT-23A surface
mount packages.
Functional Block Diagram
Part
Number
Package
Osc.
Freq.
(kHz)
Operating
Temp.
Range
TC1219ECH 6-Pin SOT-23A
12
-40°C to +85°C
TC1220ECH 6-Pin SOT-23A
35
-40°C to +85°C
C+
C–
TC1219ECH
TC1220ECH
12
3
54
VIN
SHDN
GND
6-Pin SOT-23A
NOTE: 6-Pin SOT-23A is equivalent to the EIAJ SC-74
OUT
6
TC1219
TC1220
VIN
V–
Output
C+
C–
C1
C2
Input
GND
OUT
SHDN
ON
OFF
+
Negative Voltage Inverter
Switched Capacitor Voltage Converters with Shutdown in SOT Packages
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